Título

DYNAMIC EFFECTS AND TORQUE LIMITATION IN HEAVY PLATE MILL DRIVELINES

DYNAMIC EFFECTS AND TORQUE LIMITATION IN HEAVY PLATE MILL DRIVELINES

Autoria

Miazzo, Paulo Eduardo Chepuck; Jesus, Kleber Almeida Ramos de; Bergström, David; Myrgren, Daniel

DOI

10.5151/2594-5297-20604

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Resumo

Driveline design for heavy plate mill is getting more complicated with the increased steel grades and wider mills, thus the request for increased rolling torque. Yet the dimensions stay the same as before to hold the rolling force on a manageable level. This put the driveline design to its extreme, due to reduced margin between design torque and operating torque. Torque levels in a driveline have for long been considered as even distributed over the distance of the driveline, with possibly a time difference. Natural frequencies other than the first have often been considered insignificant. We have discovered dynamic effects that vastly alter the torque levels in the driveline. The dynamics of a driveline is affected of its design, considering its stiffness, length, mass of inertia in combination with the gradient of the incoming torque peak. The motor control system is in addition working with or against the effect of the dynamic behaviour. We have simulated and case studied the dynamic behaviour of HPM drivelines to find an explanation to the behaviour, a potential design and solution to the problem of protecting a driveline from torque overloads, yet still is able to get maximum production out of the mill.

 

Driveline design for heavy plate mill is getting more complicated with the increased steel grades and wider mills, thus the request for increased rolling torque. Yet the dimensions stay the same as before to hold the rolling force on a manageable level. This put the driveline design to its extreme, due to reduced margin between design torque and operating torque. Torque levels in a driveline have for long been considered as even distributed over the distance of the driveline, with possibly a time difference. Natural frequencies other than the first have often been considered insignificant. We have discovered dynamic effects that vastly alter the torque levels in the driveline. The dynamics of a driveline is affected of its design, considering its stiffness, length, mass of inertia in combination with the gradient of the incoming torque peak. The motor control system is in addition working with or against the effect of the dynamic behaviour. We have simulated and case studied the dynamic behaviour of HPM drivelines to find an explanation to the behaviour, a potential design and solution to the problem of protecting a driveline from torque overloads, yet still is able to get maximum production out of the mill.

Palavras-chave

Dynamic drivelines; Rolling mills; Torque limitation; Driveline design.

Dynamic drivelines; Rolling mills; Torque limitation; Driveline design.